I believe in the power of love and kindness.

你永远不会太老而不能设定另一个目标或做一个新的梦。

历史是时间写在人类记忆上的一首循环诗。

In a time of universal deceit, telling the truth is a revolutionary act.

We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.